The cables sheath is used to protect the cable from the external damages and also used to hold the multiple conductors inside the cable together.
In simple terms, the outer layer of a cable is called sheath.
The sheath may be available in two layers in a cable called as Inner sheath and Outer sheath as shown in below figure.
The cable sheath material will be selected based on the usage/application of the cable and it’s operating temperature.
The applicable standard for the selection of the cable sheath material based on the IEC 60092-359 standard.
Different types of cable sheaths are available to use as per the application. The selection of cable sheaths are different for high-voltage, high-current, fire resistant, fire retardant applications etc.
The following are different types of cable sheath materials:
The standards for cable sheath materials are mentioned below:
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BS EN 50288-7 allows both Lead sheath and multi-layer sheathing, if i will use multi-layer sheath for control cable what will the disadvantage?
when i can use multi-layer sheath instead of Lead sheath?